Muffler for gasolene-engines.



No. 692,211. Patented 1an. 2a, |902.

, s. L. nEENsnEnNA.

MUFFLER FOR GASOLENE ENGINES.`

(Application led Mar. 21, 1900.)

UNITED STATES rPATENT OFFICE.l

GUSTAF L. REENSTIERNA, OF WINCHESTER, MASSACHUSETTS.

MUFFLER FOR GASOLENE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 692,211, dated January28, 1902. Application iiled March 21, 1,900. Serial No. 9,525. `(lilomodel.)

To all whom t mag/concern:

Beit known that LGUSTAF L. REENSTIERNA, a citizen of the United States,residing a't Winchester, in the county of Middlesex, State ofMassachusetts, have invented a certain new and useful Improvement inMufders for Gasolene-Engines, of which the following is a specification,reference being had therein to the accompanying drawing.

The object ofthe invention is to provide, means for preventing the noisewhich usually is manifest in'connection with the exhaust of gasolene andother explosive or internal-combustion engines.

The invention consists in the improved means of preventing noise inconnection with the exhaust of engines such as aforesaid, and whichmeans I will now proceed to describe with the aid of the accompanyingdrawing.

In the said drawing I have illustrated the best .embodiment of theinvention which I have thus far contrived.

The drawing shows, partly in vertical section, a portion of agasolene-engine having the said embodiment of the invention appliedthereto. Y

Such features of the engine as are shown in the drawing aresubstantially the same as the corresponding ones in my application forUnited States Letters Patent led November 2, 1899, Serial No. 735,582.The invention itself, however, is not necessarily restricted to use withany particular construction of engine.

The particular engine in connection with which I have illustrated anembodiment of the present invention is provided with a suitable bed, as1, and the two cylinders, as 22,

- on the said bed in line with each other.

my application aforesaid for United States Letters Patent ytiledNovember 2, 1899, are shown inthe accompanying drawing, and comprise,essentially, the disk-like terminal 10, supportedin convenient manner bythe fixed head of each cylinder 2, and the bent yielding terminal 11,carried by and moving with the trunk-piston 3 within the cylinder. Aswill be understood, the movement of the piston causes its terminal 11 tomake contact VVwith the stationary terminal 10, with resultingproduction of the spark. The exhaustports of the cylinders are supposedto be shown at 12 12, being indicated in dotted lines, and 13 13designate the valves controlling the said ports. The said valves areoperated by means of levers 14 14, which last are operated by means ofcams 15 15, the said cams being connected with the gear 16 to turn inunison with the latter, and the said gear being driven by means of thepinion 17 on the crank-shaft 8.

The parts which have been referred to thus far have been described inorder to make clear the relations, &c., of the invention. It is to beunderstood that the said parts, together with the other necessary partsand adjuncts (not shown) of an engine, may be of any suitable orpreferred character, construction, and arrangement in practice.

18 18 designate pipes communicating with the exhaust-ports12 12 andserving to lead away the exhaust from the two cylinders. These pipescommunicate with the muftling device, in which the invention moreimmediately resides. In the present instance the mu'fding device is madedouble to correspond with the construction of the engine.

The muffling device comprises, essentially, concentric shells 19, 20,and 21, each perforated, as presently will be explained, and reticulatedmaterial-1l. e. ,layers of wire-netting 22 22 22-occupying the interiorof the central shell 19 and the spaces intermediate the successiveshells and concentric, or substantially so, with the shells betweenwhich such layers intervene. The arrangement of shells and wire-nettingis clearly illustrated by the sectional representation in the drawing.The

perforations of the respective shells are designated 23 23. Theperforations of the innermost shell bein g arranged in a given position,

those of the next outershell are disposed part way around, so as tostand out of line with the said perforations of the innermost shell orto break joint therewith, while those of the next outer shell in turnare similarly positioned or set. I ndin practice thatthe muffler is mosteffective for reducingthe noises of the exhaust when each perforation ofthe innermost shell or of the next outer shell is substantiallyequidistant from each of the group of 'perforations nearest to it in thenext outermost shell-that is to say, a perforation in the innermostshell should preferably be so located that the exhaust passing throughit will strike the middle or next outermost shell midway between theperforations in said latter shell, and the same is true ot' thearrangement of each perforation in the said middle or next outermostshell.

The various shells are closed at their ends in a manner as presentlywill be described, with the exception that a passage for theexhaustcommunicates with one end of the central shell. This passage isdesignated 24, and through the same the exhaust passes from the pipe 18into the interior of the central shell 19. The exhaust fills the saidcentral space, it going through the holes 23 of the central shell intothe space intermediate the latter and the next inclosing shell, findingits way in turn through the holes of the latter, and finally issuingthrough the holes of the outermost shell.

The shells 19, 20, and 21 preferably are composed of pipes of thevarious diameters which are required, and the closing of the endsthereof is effected by means of caps or equivalent devices havingscrew-threaded portions, which are caused to become engaged withcorrespondingly-threaded portions of the said shells. A convenient formof cap which may be employed at one end of the series of shells isindicated at 25. It is formed with an internally-threaded flange 26, ahub 27 inside the said flange and exteriorly threaded, and a nipple 28on the said hub, the said nipple being exteriorly threaded. One end ofthe pipe or shell 19 is screwed onto the said nipple 28, one end of thepipe or shell 20 being screwed onto the hub 27 and one end of the pipeor shell 21 being screwed inside the fiange 26. Cap 25 has aprolongation 29, to which is connected, by means of a union 30, one endof the exhaust-pipe 1S. The opposite end of the pipe or shell 19 isclosed by a cap 3l, that of the pipe or shell 2O being closed by the cap32, while the corresponding end of the pipe or shell 21 is closed by adevice 33. In the present instance I have illustrated the invention inthe form which is suitable for use in connection with an engine havingopposite cylinders 2 2 in line with each other, and thus I have showntwo sets of the said pipes or shells 19 20 21 arranged and combined inthe manner already explained, one set for each cylinder, the device 33being arranged to connect with the outermost pipes or shells 2l 21 orboth sets. The device 33 may be termed for convenience of designation adouble cap. In the illustrated embodiment of the invention the doublemuftling device is arranged below the bed 1 of the engine and parallelwith the axes of the two cylinders. This arrangement is adopted forconvenience.

It will be obvious that various modications may be made in the form,construction, and arrangement of the parts without involving a departurefrom the principle of the invention.

What I claim is- 1. The improved muffiing device comprising successivechambers communicating with one another through holes out of line orbreaking joint in the successive separating media, woven-wire fabricfilling the respective chambers, and means to lead the exhaust into therst chamber of the series, substantially as described.

2. The improved mufliing device for gasolene-engines and the like,comprising concentric shells having holes therethrough at differentsides thereof to break joints, as set forth, concentric layers ofreticulated material filling the spaces of the said shells, and means tolead the exhaust into the central shell, substantially as described.

3. The improved rnu'fliing device for gasolene-engines and the like,comprising concentric shells having holestherethrough, concentric layersof reticulated material iilling the spaces of the said shells, capsclosing the ends of said shells, and a passage leading into one end ot'the central shell, the exhaust escaping through the holes of theexterior shell, substantially as described.

4:. In combination, the cylinder of a gasoleneengine or the like, a setof concentric shells having holes therethrough and closed ends,concentric layers of reticulated material filling the spaces of the saidshells, and means to lead the exhaust from the cylinder into one end ofthe central shell, the said exhaust escaping through the holes of theexterior shell, substantially as described.

5. The improved mu'ftling device for gasolene-engines and the like,comprising concentric shells having holes therethrough, each hole ineach of the inner shells being opposite the center of a space betweenthe nearest holes in the next outermost shell, concentric layers ofreticulated material filling the spaces ofthe said shells, caps closingthe ends of said shells, and a passage leading into one end of thecentral shell, the said exhaust escaping through the holes of theexterior shell, substantially as described.

6. In combination ,the two engine-cylinders, two sets of concentricshells in which each shell has holes therethrough and wire fillingoccupying the spaces within the said shells, the double cap connectingand closing the loo Iog,

IIO

Irl-testimony whereof I ax my signature in presence of two witnesses.

GUSTAF L. REENSTIERNA-` Witnesses:

exhaust escaping through the holes of the ex-V l WM. A. MACLOD, teriorshell, substantially as described.

ALICE H. MORRISON.

